On the DB rows, and others for that matter, think about pushing the elbows to the roof. The point about taking the biceps out of the pull is spot on. Don't over grip and then focus on moving the elbows toward the roof. First time you will realize how little you have been working that back.

In that case, I think I best go lighter, otherwise I'm gonna trigger some really bad TOS related pain, especially if the other method has been working them very "little". Thanks for highlighting that.